Prop Key Size


New Member
My Prop keys are original showing ware. Last year when a prop broke I also lost a key. I got a 5/16" key stock and ground one side down on my son's bench grinder to about 5/16 X 1/4". Does anyone know are original keys 5/16 X 1/4" which I might find a length of key stock or are they actually something metric.

Jon March

Scott - maybe a quick call to Scott at Gordons, and he probably would check it with a micrometer gauge for you - he is very generous.
They are metric, 7 x 8 x 60
Everything is metric on Amphicar except the stuff that bolts to the engine block.
One tip, some farm machinery suppliers have metric parts on the shelf, good quality and price. The Amphicar grease fittings are the same as used on Lamborghini Combine Harvesters !

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